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An undated file hand-out photo of a Quarter Pounder made with fresh beef. McDonald’s says it's testing fresh beef in another burger, called Archburger, the chain's latest look at swapping out frozen beef as it seeks to improve the image of its food.

McDonald's is testing the use of fresh beef in another burger, the latest move by the fast food chain to swap out frozen beef as it seeks to improve its image.

The company said Tuesday that the new burger, called Archburger, is being tested in seven McDonald's restaurants in Tulsa, Oklahoma. McDonald's held similar tests for fresh beef Quarter Pounders for about a year before announcing in March that it would roll it out to most of its 14,000 restaurants by the middle of this year. McDonald's said the latest test is limited, and it is seeking feedback from customers and its restaurants.

McDonald's Corp. has made several changes to its menu in recent years in an attempt to appeal to Americans who are increasingly concerned with the ingredients in their food. The world's largest burger chain, for example, has cut artificial preservatives from Chicken McNuggets and switched out the apple juice in its Happy Meals for one with less sugar.

Fresh beef is a big change for the Oak Brook, Illinois-based company, which has relied on frozen beef patties for more than 40 years.

The Archburger test could mean the company is open to expanding the use of fresh beef to even more menu items, analysts at Nomura said in a note to clients Tuesday. The analysts also said the rollout of fresh beef Quarter Pounders later this year could boost a key sales figure at the chain.

At less than 3 ounces, McDonald's said the fresh beef patties used in the Archburger are slightly smaller than those in the Quarter Pounder and larger than the ones in its hamburgers and cheeseburgers.